Patient time for test: 1 1/2 to 2 hours
Reliability of test results:
*Good but not as reliable as CT scans. Other tests, studies and
clinical observations are necessary to establish a precise
Purpose of test:
*Determines whether jaundice is caused by a blocked bile duct or by
*Screens for liver disease.
*Detects whether cancer has spread to the liver
. *Detects hematoma following an injury.
*Defines cold spots as tumors, abscesses or cysts.
Where test is performed:
*Commercial laboratory, hospital, doctor's office, outpatient or
free-standing surgical facility.
Risks and Precautions:
*Don't eat any food or drink any liquid for at least 12 hours
before the test.
*Remove all clothing. Put on surgical gown.
Description of test:
*You or a close relative will be required to sign a consent form
after the procedure has been explained to you.
*Follow technician's instructons for positioning your body.
*You may be uncomfortable for short periods when you assume the
positions the technician requests.
*You may also feel uncomfortable for a short while if small,
enclosed space causes you discomfort.
*Water-soluble lubricant is applied to your skin.
*Technician guides a transducer, which may feel cold on your skin,
over the area examined.
*Transducer sends an ultrasound beam, composed of very
high-frequency soundwaves inaudible to the human ear.
*After passing through tissue, reflected soundwaves are converted
into electrical impulses and displayed on a video screen for
interpretation or photographing for later interpretation.
*In sincalide is injected to stimulate gallbladder contraction, you
may experience some side effects, such as abdominal cramping,
spasms of the anus or bladder, nausea, dizziness, sweating and
Activity after test:
*Resume normal diet
*Return to pretest activities right away
Time before test results available:
*Time before results are reported to the doctor or patient varies
from a few minutes to a few days.
*No anatomical or functional abnormalities
What "abnormal" may indicate:
Taking these drugs may affect test results:
Other factors that may affect test results:
*Failure to fast overnight
*Dehydration of your body
*Barium from previous diagnostic tests
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